package com.sky.service.impl;

import com.alibaba.druid.util.StringUtils;
import com.alibaba.fastjson.JSONObject;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;


@Service
public class UserServiceImpl implements UserService {

    private static final String JSCODE_URL = "https://api.weixin.qq.com/sns/jscode2session";

   @Autowired(required=false)
   UserMapper userMapper;


    @Override
    public User login(UserLoginDTO userLoginDTO) {
        //1.调用微信官方接口 获取微信openID(微信的唯一标识）
        Map<String,String> paramMap = new HashMap<>();
        paramMap.put("appid","wx4206132e5474ca7d");
        paramMap.put("secret","79a1537f57e1a87fdf9d5a282c338330");
        paramMap.put("js_code",userLoginDTO.getCode());
        paramMap.put("grant_type","authorization_code");
        String result = HttpClientUtil.doGet(JSCODE_URL,paramMap);
        //解析微信登陆
        JSONObject jsonObject = JSONObject.parseObject(result);
        String openid = jsonObject.getString("openid");

        //2.判断openID是否为null,如果为null 则抛异常提示信息
        if(StringUtils.isEmpty(openid)){
            throw new LoginFailedException("微信登陆失败");
        }

        //3.先查询数据库中 opid对应的用户id是否存在，
        User user = userMapper.getByopenId(openid);

        //4.不存在则新增用户
        if(user==null){
            user = new User();
            user.setName("微信用户");
            user.setOpenid(openid);
            user.setCreateTime(LocalDateTime.now());
            userMapper.insert(user);
        }

        //5.存在则直接返回用户信息
        return user;
    }
}
